pool

国家固定FE

年份固定RE

LagDV

High−income Student

0.175^*** (8.541)

0.065^*** (4.712)

0.157^*** (10.10)

0.003 (0.279)

GDP

0.604^*** (9.325)

2.062^*** (30.203)

0.430^*** (8.150)

0.532^*** (5.663)

IGDP

0.603^*** (5.370)

1.186^*** (13.001)

0.344^*** (3.712)

0.148^** (1.808)

population

0.305^*** (5.083)

1.187^*** (2.332)

0.487^*** (9.919)

−1.089^*** (−2.618)

Middle and high income Student

0.172^*** (4.793)

0.026^* (1.313)

0.166^*** (5.607)

0.018 (0.756)

GDP

1.447^*** (14.50)

1.977^*** (37.86)

0.442^*** (2.920)

0.467^** (2.185)

IGDP

0.596^*** (3.983)

0.403^*** (3.451)

0.852^*** (5.900)

0.062 (0.677)

population

−0.689^*** (−5.6)

−0.580^* (−1.391)

0.242^* (1.564)

0.416 (0.824)